I actually have a whole series of posts up: http://norswap.com/ruby-dark-corners/ http://norswap.com/ruby-dark-corners/ The three topics (module linearization,

I actually have a whole series of posts up: http://norswap.com/ruby-dark-corners/ http://norswap.com/ruby-dark-corners/ The three topics (module linearization, scope lookups and method parameters) are constant source of wtfs as soon as you go beyond something basic.